Value Collection 221232BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221232BR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications that require a smooth, hardened bearing surface. The shoulder measures 0.75 inches in diameter and 3 inches in length, providing a reliable pivot or guide pin surface in jigs, fixtures, and mechanical assemblies. The 5/8-11 UNC threaded section pulls the fastener tight while the uncoated alloy steel shoulder absorbs radial loads. A hex socket drive accepts a 3/8 inch drive tool for controlled installation in confined spaces.

This shoulder screw suits industrial and mechanical maintenance applications where a precise bearing diameter is required. Common install scenarios include fixture plates, die sets, linkage assemblies, and equipment panels. The 1 inch head diameter and 0.5 inch head height seat flush against standard counterbored holes. Machinists, millwrights, and maintenance technicians typically specify this fastener when a hardened, close-tolerance pin-and-thread combination is needed in a single component.

Key Features

• 0.75 inch shoulder diameter with 3 inch shoulder length for extended bearing surface
• Grade 8 alloy steel construction for high tensile and shear strength
• 5/8-11 UNC thread for compatibility with standard tapped holes
• Hex socket drive accepts a 3/8 inch hex key or socket driver
• Uncoated finish suitable for secondary plating or use as-is in dry environments
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard-dimension shoulder screw for use in any application requiring a 3/4 inch shoulder diameter, 3 inch shoulder length, and 5/8-11 UNC threaded engagement, conforming to ANSI B18.3 and ASME/ANSI B18.3 dimensional standards.

Installation Notes

Install using a 3/8 inch hex key or socket driver; do not use an impact driver, as overtorquing can damage the threaded section or distort the precision shoulder. Ensure the mating counterbore is machined to the correct tolerance for a 0.75 inch shoulder before installation. De-energize or lock out any equipment per applicable OSHA lockout/tagout procedures before replacing fasteners in live machinery. Inspect the mating bore and thread for wear or contamination prior to installation.